<?php

/* ~ class.smtp.php
  .---------------------------------------------------------------------------.
  |  Software: PHPMailer - PHP email class                                    |
  |   Version: 5.2.6                                                          |
  |      Site: https://github.com/PHPMailer/PHPMailer/                        |
  | ------------------------------------------------------------------------- |
  |    Admins: Marcus Bointon                                                 |
  |    Admins: Jim Jagielski                                                  |
  |   Authors: Andy Prevost (codeworxtech) codeworxtech@users.sourceforge.net |
  |          : Marcus Bointon (coolbru) phpmailer@synchromedia.co.uk          |
  |          : Jim Jagielski (jimjag) jimjag@gmail.com                        |
  |   Founder: Brent R. Matzelle (original founder)                           |
  | Copyright (c) 2010-2012, Jim Jagielski. All Rights Reserved.              |
  | Copyright (c) 2004-2009, Andy Prevost. All Rights Reserved.               |
  | Copyright (c) 2001-2003, Brent R. Matzelle                                |
  | ------------------------------------------------------------------------- |
  |   License: Distributed under the Lesser General Public License (LGPL)     |
  |            http://www.gnu.org/copyleft/lesser.html                        |
  | This program is distributed in the hope that it will be useful - WITHOUT  |
  | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or     |
  | FITNESS FOR A PARTICULAR PURPOSE.                                         |
  '---------------------------------------------------------------------------'
 */

/**
 * PHPMailer - PHP SMTP email transport class
 * NOTE: Designed for use with PHP version 5 and up
 * @package PHPMailer
 * @author Andy Prevost
 * @author Marcus Bointon
 * @copyright 2004 - 2008 Andy Prevost
 * @author Jim Jagielski
 * @copyright 2010 - 2012 Jim Jagielski
 * @license http://www.gnu.org/copyleft/lesser.html Distributed under the Lesser General Public License (LGPL)
 */

/**
 * PHP RFC821 SMTP client
 *
 * Implements all the RFC 821 SMTP commands except TURN which will always return a not implemented error.
 * SMTP also provides some utility methods for sending mail to an SMTP server.
 * @author Chris Ryan
 * @package PHPMailer
 */
class SMTP {

    /**
     *  SMTP server port
     *  @var int
     */
    public $SMTP_PORT = 25;

    /**
     *  SMTP reply line ending (don't change)
     *  @var string
     */
    public $CRLF = "\r\n";

    /**
     *  Debug output level; 0 for no output
     *  @var int
     */
    public $do_debug = 0;

    /**
     * Sets the function/method to use for debugging output.
     * Right now we only honor 'echo' or 'error_log'
     * @var string
     */
    public $Debugoutput = 'echo';

    /**
     *  Sets VERP use on/off (default is off)
     *  @var bool
     */
    public $do_verp = false;

    /**
     * Sets the SMTP timeout value for reads, in seconds
     * @var int
     */
    public $Timeout = 15;

    /**
     * Sets the SMTP timelimit value for reads, in seconds
     * @var int
     */
    public $Timelimit = 30;

    /**
     * Sets the SMTP PHPMailer Version number
     * @var string
     */
    public $Version = '5.2.6';

    /////////////////////////////////////////////////
    // PROPERTIES, PRIVATE AND PROTECTED
    /////////////////////////////////////////////////

    /**
     * @var resource The socket to the server
     */
    private $smtp_conn;

    /**
     * @var string Error message, if any, for the last call
     */
    private $error;

    /**
     * @var string The reply the server sent to us for HELO
     */
    private $helo_rply;

    /**
     * Outputs debugging info via user-defined method
     * @param string $str
     */
    private function edebug($str) {
        if ($this->Debugoutput == 'error_log') {
            error_log($str);
        } else {
            echo $str;
        }
    }

    /**
     * Initialize the class so that the data is in a known state.
     * @access public
     * @return SMTP
     */
    public function __construct() {
        $this->smtp_conn = 0;
        $this->error = null;
        $this->helo_rply = null;

        $this->do_debug = 0;
    }

    /////////////////////////////////////////////////
    // CONNECTION FUNCTIONS
    /////////////////////////////////////////////////

    /**
     * Connect to the server specified on the port specified.
     * If the port is not specified use the default SMTP_PORT.
     * If tval is specified then a connection will try and be
     * established with the server for that number of seconds.
     * If tval is not specified the default is 30 seconds to
     * try on the connection.
     *
     * SMTP CODE SUCCESS: 220
     * SMTP CODE FAILURE: 421
     * @access public
     * @param string $host
     * @param int $port
     * @param int $tval
     * @return bool
     */
    public function Connect($host, $port = 0, $tval = 30) {
        // set the error val to null so there is no confusion
        $this->error = null;

        // make sure we are __not__ connected
        if ($this->connected()) {
            // already connected, generate error
            $this->error = array('error' => 'Already connected to a server');
            return false;
        }

        if (empty($port)) {
            $port = $this->SMTP_PORT;
        }

        // connect to the smtp server
        $this->smtp_conn = @fsockopen($host, // the host of the server
                        $port, // the port to use
                        $errno, // error number if any
                        $errstr, // error message if any
                        $tval);   // give up after ? secs
        // verify we connected properly
        if (empty($this->smtp_conn)) {
            $this->error = array('error' => 'Failed to connect to server',
                'errno' => $errno,
                'errstr' => $errstr);
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ": $errstr ($errno)" . $this->CRLF . '<br />');
            }
            return false;
        }

        // SMTP server can take longer to respond, give longer timeout for first read
        // Windows does not have support for this timeout function
        if (substr(PHP_OS, 0, 3) != 'WIN') {
            $max = ini_get('max_execution_time');
            if ($max != 0 && $tval > $max) { // don't bother if unlimited
                @set_time_limit($tval);
            }
            stream_set_timeout($this->smtp_conn, $tval, 0);
        }

        // get any announcement
        $announce = $this->get_lines();

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $announce . $this->CRLF . '<br />');
        }

        return true;
    }

    /**
     * Initiate a TLS communication with the server.
     *
     * SMTP CODE 220 Ready to start TLS
     * SMTP CODE 501 Syntax error (no parameters allowed)
     * SMTP CODE 454 TLS not available due to temporary reason
     * @access public
     * @return bool success
     */
    public function StartTLS() {
        $this->error = null; # to avoid confusion

        if (!$this->connected()) {
            $this->error = array('error' => 'Called StartTLS() without being connected');
            return false;
        }

        $this->client_send('STARTTLS' . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 220) {
            $this->error =
                    array('error' => 'STARTTLS not accepted from server',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }

        // Begin encrypted connection
        if (!stream_socket_enable_crypto($this->smtp_conn, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {
            return false;
        }

        return true;
    }

    /**
     * Performs SMTP authentication.  Must be run after running the
     * Hello() method.  Returns true if successfully authenticated.
     * @access public
     * @param string $username
     * @param string $password
     * @param string $authtype
     * @param string $realm
     * @param string $workstation
     * @return bool
     */
    public function Authenticate($username, $password, $authtype = 'LOGIN', $realm = '', $workstation = '') {
        if (empty($authtype)) {
            $authtype = 'LOGIN';
        }

        switch ($authtype) {
            case 'PLAIN':
                // Start authentication
                $this->client_send('AUTH PLAIN' . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 334) {
                    $this->error =
                            array('error' => 'AUTH not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
                    }
                    return false;
                }
                // Send encoded username and password
                $this->client_send(base64_encode("\0" . $username . "\0" . $password) . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 235) {
                    $this->error =
                            array('error' => 'Authentication not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
                    }
                    return false;
                }
                break;
            case 'LOGIN':
                // Start authentication
                $this->client_send('AUTH LOGIN' . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 334) {
                    $this->error =
                            array('error' => 'AUTH not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
                    }
                    return false;
                }

                // Send encoded username
                $this->client_send(base64_encode($username) . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 334) {
                    $this->error =
                            array('error' => 'Username not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
                    }
                    return false;
                }

                // Send encoded password
                $this->client_send(base64_encode($password) . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 235) {
                    $this->error =
                            array('error' => 'Password not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
                    }
                    return false;
                }
                break;
            case 'NTLM':
                /*
                 * ntlm_sasl_client.php
                 * * Bundled with Permission
                 * *
                 * * How to telnet in windows: http://technet.microsoft.com/en-us/library/aa995718%28EXCHG.65%29.aspx
                 * * PROTOCOL Documentation http://curl.haxx.se/rfc/ntlm.html#ntlmSmtpAuthentication
                 */
                require_once 'extras/ntlm_sasl_client.php';
                $temp = new stdClass();
                $ntlm_client = new ntlm_sasl_client_class;
                if (!$ntlm_client->Initialize($temp)) {//let's test if every function its available
                    $this->error = array('error' => $temp->error);
                    if ($this->do_debug >= 1) {
                        $this->edebug('You need to enable some modules in your php.ini file: ' . $this->error['error'] . $this->CRLF);
                    }
                    return false;
                }
                $msg1 = $ntlm_client->TypeMsg1($realm, $workstation); //msg1

                $this->client_send('AUTH NTLM ' . base64_encode($msg1) . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);


                if ($code != 334) {
                    $this->error =
                            array('error' => 'AUTH not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF);
                    }
                    return false;
                }

                $challenge = substr($rply, 3); //though 0 based, there is a white space after the 3 digit number....//msg2
                $challenge = base64_decode($challenge);
                $ntlm_res = $ntlm_client->NTLMResponse(substr($challenge, 24, 8), $password);
                $msg3 = $ntlm_client->TypeMsg3($ntlm_res, $username, $realm, $workstation); //msg3
                // Send encoded username
                $this->client_send(base64_encode($msg3) . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 235) {
                    $this->error =
                            array('error' => 'Could not authenticate',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF);
                    }
                    return false;
                }
                break;
            case 'CRAM-MD5':
                // Start authentication
                $this->client_send('AUTH CRAM-MD5' . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 334) {
                    $this->error =
                            array('error' => 'AUTH not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
                    }
                    return false;
                }

                // Get the challenge
                $challenge = base64_decode(substr($rply, 4));

                // Build the response
                $response = $username . ' ' . $this->hmac($challenge, $password);

                // Send encoded credentials
                $this->client_send(base64_encode($response) . $this->CRLF);

                $rply = $this->get_lines();
                $code = substr($rply, 0, 3);

                if ($code != 334) {
                    $this->error =
                            array('error' => 'Credentials not accepted from server',
                                'smtp_code' => $code,
                                'smtp_msg' => substr($rply, 4));
                    if ($this->do_debug >= 1) {
                        $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
                    }
                    return false;
                }
                break;
        }
        return true;
    }

    /**
     * Works like hash_hmac('md5', $data, $key) in case that function is not available
     * @access private
     * @param string $data
     * @param string $key
     * @return string
     */
    private function hmac($data, $key) {
        if (function_exists('hash_hmac')) {
            return hash_hmac('md5', $data, $key);
        }

        // The following borrowed from http://php.net/manual/en/function.mhash.php#27225
        // RFC 2104 HMAC implementation for php.
        // Creates an md5 HMAC.
        // Eliminates the need to install mhash to compute a HMAC
        // Hacked by Lance Rushing

        $b = 64; // byte length for md5
        if (strlen($key) > $b) {
            $key = pack('H*', md5($key));
        }
        $key = str_pad($key, $b, chr(0x00));
        $ipad = str_pad('', $b, chr(0x36));
        $opad = str_pad('', $b, chr(0x5c));
        $k_ipad = $key ^ $ipad;
        $k_opad = $key ^ $opad;

        return md5($k_opad . pack('H*', md5($k_ipad . $data)));
    }

    /**
     * Returns true if connected to a server otherwise false
     * @access public
     * @return bool
     */
    public function Connected() {
        if (!empty($this->smtp_conn)) {
            $sock_status = stream_get_meta_data($this->smtp_conn);
            if ($sock_status['eof']) {
                // the socket is valid but we are not connected
                if ($this->do_debug >= 1) {
                    $this->edebug('SMTP -> NOTICE:' . $this->CRLF . 'EOF caught while checking if connected');
                }
                $this->Close();
                return false;
            }
            return true; // everything looks good
        }
        return false;
    }

    /**
     * Closes the socket and cleans up the state of the class.
     * It is not considered good to use this function without
     * first trying to use QUIT.
     * @access public
     * @return void
     */
    public function Close() {
        $this->error = null; // so there is no confusion
        $this->helo_rply = null;
        if (!empty($this->smtp_conn)) {
            // close the connection and cleanup
            fclose($this->smtp_conn);
            $this->smtp_conn = 0;
        }
    }

    /////////////////////////////////////////////////
    // SMTP COMMANDS
    /////////////////////////////////////////////////

    /**
     * Issues a data command and sends the msg_data to the server
     * finializing the mail transaction. $msg_data is the message
     * that is to be send with the headers. Each header needs to be
     * on a single line followed by a <CRLF> with the message headers
     * and the message body being seperated by and additional <CRLF>.
     *
     * Implements rfc 821: DATA <CRLF>
     *
     * SMTP CODE INTERMEDIATE: 354
     *     [data]
     *     <CRLF>.<CRLF>
     *     SMTP CODE SUCCESS: 250
     *     SMTP CODE FAILURE: 552, 554, 451, 452
     * SMTP CODE FAILURE: 451, 554
     * SMTP CODE ERROR  : 500, 501, 503, 421
     * @access public
     * @param string $msg_data
     * @return bool
     */
    public function Data($msg_data) {
        $this->error = null; // so no confusion is caused

        if (!$this->connected()) {
            $this->error = array(
                'error' => 'Called Data() without being connected');
            return false;
        }

        $this->client_send('DATA' . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 354) {
            $this->error =
                    array('error' => 'DATA command not accepted from server',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }

        /* the server is ready to accept data!
         * according to rfc 821 we should not send more than 1000
         * including the CRLF
         * characters on a single line so we will break the data up
         * into lines by \r and/or \n then if needed we will break
         * each of those into smaller lines to fit within the limit.
         * in addition we will be looking for lines that start with
         * a period '.' and append and additional period '.' to that
         * line. NOTE: this does not count towards limit.
         */

        // normalize the line breaks so we know the explode works
        $msg_data = str_replace("\r\n", "\n", $msg_data);
        $msg_data = str_replace("\r", "\n", $msg_data);
        $lines = explode("\n", $msg_data);

        /* we need to find a good way to determine is headers are
         * in the msg_data or if it is a straight msg body
         * currently I am assuming rfc 822 definitions of msg headers
         * and if the first field of the first line (':' sperated)
         * does not contain a space then it _should_ be a header
         * and we can process all lines before a blank "" line as
         * headers.
         */

        $field = substr($lines[0], 0, strpos($lines[0], ':'));
        $in_headers = false;
        if (!empty($field) && !strstr($field, ' ')) {
            $in_headers = true;
        }

        $max_line_length = 998; // used below; set here for ease in change

        while (list(, $line) = @each($lines)) {
            $lines_out = null;
            if ($line == '' && $in_headers) {
                $in_headers = false;
            }
            // ok we need to break this line up into several smaller lines
            while (strlen($line) > $max_line_length) {
                $pos = strrpos(substr($line, 0, $max_line_length), ' ');

                // Patch to fix DOS attack
                if (!$pos) {
                    $pos = $max_line_length - 1;
                    $lines_out[] = substr($line, 0, $pos);
                    $line = substr($line, $pos);
                } else {
                    $lines_out[] = substr($line, 0, $pos);
                    $line = substr($line, $pos + 1);
                }

                /* if processing headers add a LWSP-char to the front of new line
                 * rfc 822 on long msg headers
                 */
                if ($in_headers) {
                    $line = "\t" . $line;
                }
            }
            $lines_out[] = $line;

            // send the lines to the server
            while (list(, $line_out) = @each($lines_out)) {
                if (strlen($line_out) > 0) {
                    if (substr($line_out, 0, 1) == '.') {
                        $line_out = '.' . $line_out;
                    }
                }
                $this->client_send($line_out . $this->CRLF);
            }
        }

        // message data has been sent
        $this->client_send($this->CRLF . '.' . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 250) {
            $this->error =
                    array('error' => 'DATA not accepted from server',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }
        return true;
    }

    /**
     * Sends the HELO command to the smtp server.
     * This makes sure that we and the server are in
     * the same known state.
     *
     * Implements from rfc 821: HELO <SP> <domain> <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE ERROR  : 500, 501, 504, 421
     * @access public
     * @param string $host
     * @return bool
     */
    public function Hello($host = '') {
        $this->error = null; // so no confusion is caused

        if (!$this->connected()) {
            $this->error = array(
                'error' => 'Called Hello() without being connected');
            return false;
        }

        // if hostname for HELO was not specified send default
        if (empty($host)) {
            // determine appropriate default to send to server
            $host = 'localhost';
        }

        // Send extended hello first (RFC 2821)
        if (!$this->SendHello('EHLO', $host)) {
            if (!$this->SendHello('HELO', $host)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Sends a HELO/EHLO command.
     * @access private
     * @param string $hello
     * @param string $host
     * @return bool
     */
    private function SendHello($hello, $host) {
        $this->client_send($hello . ' ' . $host . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER: ' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 250) {
            $this->error =
                    array('error' => $hello . ' not accepted from server',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }

        $this->helo_rply = $rply;

        return true;
    }

    /**
     * Starts a mail transaction from the email address specified in
     * $from. Returns true if successful or false otherwise. If True
     * the mail transaction is started and then one or more Recipient
     * commands may be called followed by a Data command.
     *
     * Implements rfc 821: MAIL <SP> FROM:<reverse-path> <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE SUCCESS: 552, 451, 452
     * SMTP CODE SUCCESS: 500, 501, 421
     * @access public
     * @param string $from
     * @return bool
     */
    public function Mail($from) {
        $this->error = null; // so no confusion is caused

        if (!$this->connected()) {
            $this->error = array(
                'error' => 'Called Mail() without being connected');
            return false;
        }

        $useVerp = ($this->do_verp ? ' XVERP' : '');
        $this->client_send('MAIL FROM:<' . $from . '>' . $useVerp . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 250) {
            $this->error =
                    array('error' => 'MAIL not accepted from server',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }
        return true;
    }

    /**
     * Sends the quit command to the server and then closes the socket
     * if there is no error or the $close_on_error argument is true.
     *
     * Implements from rfc 821: QUIT <CRLF>
     *
     * SMTP CODE SUCCESS: 221
     * SMTP CODE ERROR  : 500
     * @access public
     * @param bool $close_on_error
     * @return bool
     */
    public function Quit($close_on_error = true) {
        $this->error = null; // so there is no confusion

        if (!$this->connected()) {
            $this->error = array(
                'error' => 'Called Quit() without being connected');
            return false;
        }

        // send the quit command to the server
        $this->client_send('quit' . $this->CRLF);

        // get any good-bye messages
        $byemsg = $this->get_lines();

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $byemsg . $this->CRLF . '<br />');
        }

        $rval = true;
        $e = null;

        $code = substr($byemsg, 0, 3);
        if ($code != 221) {
            // use e as a tmp var cause Close will overwrite $this->error
            $e = array('error' => 'SMTP server rejected quit command',
                'smtp_code' => $code,
                'smtp_rply' => substr($byemsg, 4));
            $rval = false;
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $e['error'] . ': ' . $byemsg . $this->CRLF . '<br />');
            }
        }

        if (empty($e) || $close_on_error) {
            $this->Close();
        }

        return $rval;
    }

    /**
     * Sends the command RCPT to the SMTP server with the TO: argument of $to.
     * Returns true if the recipient was accepted false if it was rejected.
     *
     * Implements from rfc 821: RCPT <SP> TO:<forward-path> <CRLF>
     *
     * SMTP CODE SUCCESS: 250, 251
     * SMTP CODE FAILURE: 550, 551, 552, 553, 450, 451, 452
     * SMTP CODE ERROR  : 500, 501, 503, 421
     * @access public
     * @param string $to
     * @return bool
     */
    public function Recipient($to) {
        $this->error = null; // so no confusion is caused

        if (!$this->connected()) {
            $this->error = array(
                'error' => 'Called Recipient() without being connected');
            return false;
        }

        $this->client_send('RCPT TO:<' . $to . '>' . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 250 && $code != 251) {
            $this->error =
                    array('error' => 'RCPT not accepted from server',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }
        return true;
    }

    /**
     * Sends the RSET command to abort and transaction that is
     * currently in progress. Returns true if successful false
     * otherwise.
     *
     * Implements rfc 821: RSET <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE ERROR  : 500, 501, 504, 421
     * @access public
     * @return bool
     */
    public function Reset() {
        $this->error = null; // so no confusion is caused

        if (!$this->connected()) {
            $this->error = array('error' => 'Called Reset() without being connected');
            return false;
        }

        $this->client_send('RSET' . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 250) {
            $this->error =
                    array('error' => 'RSET failed',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }

        return true;
    }

    /**
     * Starts a mail transaction from the email address specified in
     * $from. Returns true if successful or false otherwise. If True
     * the mail transaction is started and then one or more Recipient
     * commands may be called followed by a Data command. This command
     * will send the message to the users terminal if they are logged
     * in and send them an email.
     *
     * Implements rfc 821: SAML <SP> FROM:<reverse-path> <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE SUCCESS: 552, 451, 452
     * SMTP CODE SUCCESS: 500, 501, 502, 421
     * @access public
     * @param string $from
     * @return bool
     */
    public function SendAndMail($from) {
        $this->error = null; // so no confusion is caused

        if (!$this->connected()) {
            $this->error = array(
                'error' => 'Called SendAndMail() without being connected');
            return false;
        }

        $this->client_send('SAML FROM:' . $from . $this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($this->do_debug >= 2) {
            $this->edebug('SMTP -> FROM SERVER:' . $rply . $this->CRLF . '<br />');
        }

        if ($code != 250) {
            $this->error =
                    array('error' => 'SAML not accepted from server',
                        'smtp_code' => $code,
                        'smtp_msg' => substr($rply, 4));
            if ($this->do_debug >= 1) {
                $this->edebug('SMTP -> ERROR: ' . $this->error['error'] . ': ' . $rply . $this->CRLF . '<br />');
            }
            return false;
        }
        return true;
    }

    /**
     * This is an optional command for SMTP that this class does not
     * support. This method is here to make the RFC821 Definition
     * complete for this class and __may__ be implimented in the future
     *
     * Implements from rfc 821: TURN <CRLF>
     *
     * SMTP CODE SUCCESS: 250
     * SMTP CODE FAILURE: 502
     * SMTP CODE ERROR  : 500, 503
     * @access public
     * @return bool
     */
    public function Turn() {
        $this->error = array('error' => 'This method, TURN, of the SMTP ' .
            'is not implemented');
        if ($this->do_debug >= 1) {
            $this->edebug('SMTP -> NOTICE: ' . $this->error['error'] . $this->CRLF . '<br />');
        }
        return false;
    }

    /**
     * Sends data to the server
     * @param string $data
     * @access public
     * @return Integer number of bytes sent to the server or FALSE on error
     */
    public function client_send($data) {
        if ($this->do_debug >= 1) {
            $this->edebug("CLIENT -> SMTP: $data" . $this->CRLF . '<br />');
        }
        return fwrite($this->smtp_conn, $data);
    }

    /**
     * Get the current error
     * @access public
     * @return array
     */
    public function getError() {
        return $this->error;
    }

    /////////////////////////////////////////////////
    // INTERNAL FUNCTIONS
    /////////////////////////////////////////////////

    /**
     * Read in as many lines as possible
     * either before eof or socket timeout occurs on the operation.
     * With SMTP we can tell if we have more lines to read if the
     * 4th character is '-' symbol. If it is a space then we don't
     * need to read anything else.
     * @access private
     * @return string
     */
    private function get_lines() {
        $data = '';
        $endtime = 0;
        /* If for some reason the fp is bad, don't inf loop */
        if (!is_resource($this->smtp_conn)) {
            return $data;
        }
        stream_set_timeout($this->smtp_conn, $this->Timeout);
        if ($this->Timelimit > 0) {
            $endtime = time() + $this->Timelimit;
        }
        while (is_resource($this->smtp_conn) && !feof($this->smtp_conn)) {
            $str = @fgets($this->smtp_conn, 515);
            if ($this->do_debug >= 4) {
                $this->edebug("SMTP -> get_lines(): \$data was \"$data\"" . $this->CRLF . '<br />');
                $this->edebug("SMTP -> get_lines(): \$str is \"$str\"" . $this->CRLF . '<br />');
            }
            $data .= $str;
            if ($this->do_debug >= 4) {
                $this->edebug("SMTP -> get_lines(): \$data is \"$data\"" . $this->CRLF . '<br />');
            }
            // if 4th character is a space, we are done reading, break the loop
            if (substr($str, 3, 1) == ' ') {
                break;
            }
            // Timed-out? Log and break
            $info = stream_get_meta_data($this->smtp_conn);
            if ($info['timed_out']) {
                if ($this->do_debug >= 4) {
                    $this->edebug('SMTP -> get_lines(): timed-out (' . $this->Timeout . ' seconds) <br />');
                }
                break;
            }
            // Now check if reads took too long
            if ($endtime) {
                if (time() > $endtime) {
                    if ($this->do_debug >= 4) {
                        $this->edebug('SMTP -> get_lines(): timelimit reached (' . $this->Timelimit . ' seconds) <br />');
                    }
                    break;
                }
            }
        }
        return $data;
    }

}
